GWR Dean experimental locomotives
Encyclopedia
During the 1880s William Dean constructed a series of experimental locomotives to test various new ideas in locomotive construction for the Great Western Railway
.
T, but was rebuilt in 1882 as a 2-4-0
T. It was withdrawn in 1924.
2-4-0 tandem compound, the low- and high-pressure cylinders sharing a common crosshead. It had 7 ft 0½ in driving wheels and a high-pressure boiler rated at 180 lbf/in² (1.24 MPa
). Unsuccessful in its trials, it was never taken into stock. In 1894 it reappeared as a conventional standard gauge
4-4-0
.
, the only tank locomotive built by the Great Western Railway with single driving wheels (though not the only tank locomotive operated by the Great Western, which inherited some from the Bristol and Exeter Railway), these being 7 ft 8 in diameter and had unusually large 18 in × 26 in cylinders. It did little work as it was prone to derailing, indeed it did this in front of William Dean on its first trial move out of the shed.
In 1884 it was rebuilt as a strange-looking 2-2-2 tender locomotive with outside Stephenson's valve gear. In 1890 it was rebuilt with more conventional double frames and inside valve gear similar in style to the Queen Class. In this guise it was named Victoria in honour of Queen Victoria
.
WT. In this form it worked on the St Ives branch
and also on the Watlington
branch.
In 1897 it was rebuilt. The large bunker and rear water tank was reduced which allowed the rear carrying wheels to be removed, instead a saddle tank was fitted and the front of the frames extended to allow the fitting of a bogie
truck, thus becoming a 4-4-0
ST. It continued to work on various branch lines, being loaned to the Liskeard and Looe Railway and later continuing to work on the Looe branch
. It was also recorded on the Highworth
and Brixham branch
es, and working in the Plymouth
area, before finally moving to Swindon
from where it as withdrawn in 1926.
turned out in 1889 but with large 7 ft 0½ in driving wheels.
Following the abolition of the broad gauge in 1892 they were renewed, reappearing as standard gauge 4-4-0
locomotives in 1894.
Great Western Railway
The Great Western Railway was a British railway company that linked London with the south-west and west of England and most of Wales. It was founded in 1833, received its enabling Act of Parliament in 1835 and ran its first trains in 1838...
.
No. 1
This locomotive appeared in 1880 as a 4-4-04-4-0
Under the Whyte notation for the classification of steam locomotives, 4-4-0 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and no trailing wheels...
T, but was rebuilt in 1882 as a 2-4-0
2-4-0
Under the Whyte notation for the classification of steam locomotives, 2-4-0 represents the wheel arrangement of two leading wheels on one axle, four powered and coupled driving wheels on two axles, and no trailing wheels....
T. It was withdrawn in 1924.
No. 7
Number 7 was built in 1886 as a tandem compound 2-4-0 and later rebuilt as a 4-4-0.No. 8
Number 8 was built in 1886 as a broad gaugeBroad gauge
Broad-gauge railways use a track gauge greater than the standard gauge of .- List :For list see: List of broad gauges, by gauge and country- History :...
2-4-0 tandem compound, the low- and high-pressure cylinders sharing a common crosshead. It had 7 ft 0½ in driving wheels and a high-pressure boiler rated at 180 lbf/in² (1.24 MPa
MPA
-Academic degrees:* Master of Professional Accountancy* Master of Public Administration* Master of Public Affairs* Master of Physician's Assistant-Chemicals:* Medroxyprogesterone acetate, also known by the brand name Depo-Provera* Morpholide of pelargonic acid...
). Unsuccessful in its trials, it was never taken into stock. In 1894 it reappeared as a conventional standard gauge
Standard gauge
The standard gauge is a widely-used track gauge . Approximately 60% of the world's existing railway lines are built to this gauge...
4-4-0
4-4-0
Under the Whyte notation for the classification of steam locomotives, 4-4-0 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and no trailing wheels...
.
No. 9
This number started out in 1881 on a 4-2-4T4-2-4 (locomotive)
In Whyte notation, a 4-2-4 is a steam locomotive that has a four-wheel leading truck, one powered driving axle and a four-wheel unpowered trailing truck.Other equivalent classifications are:...
, the only tank locomotive built by the Great Western Railway with single driving wheels (though not the only tank locomotive operated by the Great Western, which inherited some from the Bristol and Exeter Railway), these being 7 ft 8 in diameter and had unusually large 18 in × 26 in cylinders. It did little work as it was prone to derailing, indeed it did this in front of William Dean on its first trial move out of the shed.
In 1884 it was rebuilt as a strange-looking 2-2-2 tender locomotive with outside Stephenson's valve gear. In 1890 it was rebuilt with more conventional double frames and inside valve gear similar in style to the Queen Class. In this guise it was named Victoria in honour of Queen Victoria
Victoria of the United Kingdom
Victoria was the monarch of the United Kingdom of Great Britain and Ireland from 20 June 1837 until her death. From 1 May 1876, she used the additional title of Empress of India....
.
No. 10
A 2-2-2 locomotive that, as with number 9, was eventually rebuilt to be similar to the Queen class. In this latter guise it was named Royal Albert in honour of Price Albert, husband of Queen Victoria.No. 13
Tank locomotive number 13 first appeared in 1886 as a 2-4-22-4-2
Under the Whyte notation for the classification of steam locomotives, 2-4-2 represents the wheel arrangement of two leading wheels on one axle, four powered and coupled driving wheels on two axles, and two trailing wheels on one axle...
WT. In this form it worked on the St Ives branch
St Ives Bay Line
The St Ives Bay Line is a railway line from to in Cornwall, United Kingdom. It was opened in 1877, the last new broad gauge passenger railway to be constructed in the country...
and also on the Watlington
Watlington
Watlington could be*Watlington, Norfolk, England*Watlington, Oxfordshire, England*Whatlington, Sussex, England*Watlington, New Zealand...
branch.
In 1897 it was rebuilt. The large bunker and rear water tank was reduced which allowed the rear carrying wheels to be removed, instead a saddle tank was fitted and the front of the frames extended to allow the fitting of a bogie
Bogie
A bogie is a wheeled wagon or trolley. In mechanics terms, a bogie is a chassis or framework carrying wheels, attached to a vehicle. It can be fixed in place, as on a cargo truck, mounted on a swivel, as on a railway carriage/car or locomotive, or sprung as in the suspension of a caterpillar...
truck, thus becoming a 4-4-0
4-4-0
Under the Whyte notation for the classification of steam locomotives, 4-4-0 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and no trailing wheels...
ST. It continued to work on various branch lines, being loaned to the Liskeard and Looe Railway and later continuing to work on the Looe branch
Looe Valley Line
The Looe Valley Line is an community railway from Liskeard to Looe in Cornwall, United Kingdom, that follows the valley of the East Looe River for much of its course...
. It was also recorded on the Highworth
Highworth
Highworth is a market town in the unitary authority of Swindon in Wiltshire, England, located about north-east of Swindon town centre. At the 2001 census it had a population of 7,996...
and Brixham branch
Torbay and Brixham Railway
The Torbay and Brixham Railway was a broad gauge railway which linked the Dartmouth and Torbay Railway at Churston railway station, Devon with the important fishing port of Brixham...
es, and working in the Plymouth
Plymouth
Plymouth is a city and unitary authority area on the coast of Devon, England, about south-west of London. It is built between the mouths of the rivers Plym to the east and Tamar to the west, where they join Plymouth Sound...
area, before finally moving to Swindon
Swindon railway station
Swindon railway station is in the town of Swindon, Wiltshire, England. The station entrance is on Station Road, to the south of the line.It is approximately from the central bus station and the town centre...
from where it as withdrawn in 1926.
No.s 14 and 16
Two rather more conventional 2-4-0 express locomotives were turned out in 1888 and ran on the broad gauge. They were similar to the standard gauge 3206 Class BarnumsGWR 3206 Class
The 3206 or Barnum Class consisted of 20 locomotives built at Swindon Works for the Great Western Railway in 1889, and was William Dean's most successful 2-4-0 design. Numbered 3206-3225, they were the last GWR locos built with "sandwich" frames...
turned out in 1889 but with large 7 ft 0½ in driving wheels.
Following the abolition of the broad gauge in 1892 they were renewed, reappearing as standard gauge 4-4-0
4-4-0
Under the Whyte notation for the classification of steam locomotives, 4-4-0 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and no trailing wheels...
locomotives in 1894.